/* 滚动条美化 */
::-webkit-scrollbar-track-piece {
    -webkit-border-radius: 0;
}
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

::-webkit-scrollbar-thumb {
    height: 50px;
    -webkit-border-radius: 4px;
    background-color: #e9e9e9;
}
::-webkit-scrollbar-thumb:hover {
    height: 50px;
    background-color: #e9e9e9;
    -webkit-border-radius: 4px;
}

.scroll-x { overflow-x: auto;}
.scroll-y { overflow-y: auto;}